Year | Value | 2023 | 46,559,969 | 2022 | 45,490,413 | 2021 | 44,528,837 | 2020 | 43,621,841 | 2019 | 42,803,598 | 2018 | 42,103,047 | 2017 | 41,400,243 | 2016 | 40,615,149 | 2015 | 39,786,548 | 2014 | 38,933,110 | 2013 | 38,072,289 | 2012 | 37,251,503 | 2011 | 36,447,977 | 2010 | 35,674,000 | 2009 | 34,958,502 | 2008 | 34,267,839 | 2007 | 33,581,297 | 2006 | 32,911,927 | 2005 | 32,243,595 | 2004 | 31,536,912 | 2003 | 30,805,933 | 2002 | 30,087,211 | 2001 | 29,375,327 | 2000 | 28,665,878 | 1999 | 27,960,961 | 1998 | 27,231,983 | 1997 | 26,453,358 | 1996 | 25,640,304 | 1995 | 24,809,689 | 1994 | 23,971,257 | 1993 | 22,988,217 | 1992 | 21,898,389 | 1991 | 20,875,328 | 1990 | 19,902,762 | 1989 | 18,976,383 | 1988 | 18,271,960 | 1987 | 17,781,455 | 1986 | 17,343,188 | 1985 | 16,973,614 | 1984 | 16,680,729 | 1983 | 16,469,185 | 1982 | 16,312,346 | 1981 | 16,155,911 | 1980 | 15,961,777 | 1979 | 15,729,601 | 1978 | 15,455,161 | 1977 | 15,141,350 | 1976 | 14,828,049 | 1975 | 14,530,516 | 1974 | 14,228,229 |
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